Bill Cosby's star of the Hollywood Walk of Fame vandalized

Someone spray-painted the words "Serial Rapist" across the star Monday night, said the Los Angeles Police Department, which is investigating the incident.

Cosby was found guilty in April
of sexually assaulting Andrea Constand
at his home in 2004. Although Constand's allegations are the only ones that have resulted in criminal charges against the actor-comedian, dozen of other women also have accused Cosby of sexual misconduct.

A Superman impersonator told CNN in 2016
he once saw a visitor allow his dog to relieve himself on the star.

Michael Jackson

This star actually honors a talk-radio host named Michael Jackson, not the late King of Pop, who has his own star with a symbol of a record. This star was spray-painted red in June, and it's not clear whether the vandals knew the difference. Either way, the pop star's daughter Paris Jackson shared a photo of herself scrubbing the star clean on Instagram
, saying, "some people have no f***ing respect."

Sofia Vergara

In 2015, the "Modern Family" actress' star was desecrated a month after it was installed. Protesters painted the words "Embryo Defense," an apparent reference to a legal dispute between Vergara and her ex-fiance
over whether she might destroy two frozen embryos from their relationship.

Bob Marley

In late 2017, the star of the late reggae icon was damaged by someone with a hammer.

John Lennon

In 2013, three days before what would have been his 73rd birthday, Lennon's star was defaced with several scrawled messages. Although none appeared to be negative, a Beatles fan club member called the doodlers "pigs" on Facebook
.

The stars are not cheap to replace

There are now more than 2,600 celebrities' stars embedded in sidewalks across a 15-block stretch of downtown Hollywood.

Whoever nominates a celebrity for a star usually pays the $40,000 cost of installing and maintaining the terrazzo and brass landmarks.

Keeping them clean and intact is not an easy task, which is why the Hollywood Chamber of Commerce -- which oversees the Walk of Fame -- has installed surveillance cameras in the hopes of deterring vandals.

"The Hollywood Walk of Fame is an institution celebrating the positive contributions of inductees. When people are angry with one of our honorees, we would hope that they would project their anger in more positive ways than to vandalize a California State landmark," said the Chamber in a new statement.